JPH0662684U - In-vehicle display device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vehicle-mounted display device that realizes a screen-up and screen-down system by using a common display to avoid cost increase. [Structure] The mounting direction of the display 1 is determined in advance by the mounting direction switch 11, and the matrix controller 1
The source driver 16 or the gate driver 15 outputs a control signal for performing a forward scan or a reverse scan on the display 4 to each pixel of the display 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle-mounted display device whose display surface can be mounted upside down.

[0002]

[Prior art]

 In-vehicle TV receivers have become widespread, and in particular, the tendency is increasing with the advent of display elements such as LCDs that can be miniaturized as displays. When mounting such a TV receiver on a vehicle, it is desirable that the size of the TV receiver is a standard front panel size, for example, 1DIN size, considering the restrictions of the mounting space and compatibility with other audio equipment. What is specified in is used.

On the other hand, in order to obtain a TV screen size necessary for easy viewing, the standard front panel size cannot be accommodated. In order to solve these problems, a TV receiver has been provided that uses a display that displays a screen only when it is used, and pulls it out from the body frame. FIG. 4 shows a TV receiver of this system. The display 1 is stored in the main body frame 2 like A when not in use, and the main body frame 2 is held by the pair of arms 3 like B in use. After being pulled out from the display 1, the display 1 is configured to be rotated at an easy-to-see angle with the shaft 4 as a fulcrum like C.

In this type of TV receiver, when adjusting the angle by pulling out the display 1 in a direction in which the screen is upward as shown in FIG. 5A, an obstacle 5 such as a shift lever is attached to the lower part as in B. If such a thing exists, it becomes difficult to rotate the display 1 at an angle that is easy to see. To solve this, arrange the display 1 in the downward direction like C, and after pulling it out, rotate the display 1 in the direction avoiding the obstacle 5 and adjust the angle. Good.

However, before actually mounting the TV receiver on the vehicle, it is often unclear whether or not an obstacle will interfere, and it is often noticed that there is an obstacle after mounting. In such a case, if you notice the obstacle caused by the obstacle 5 and attach the screen again in the downward direction, the TV receiver made by the screen upward display method with the screen facing upward is displayed on this display 1. The displayed screen is vertically and horizontally reversed as shown in B of FIG. 3 with respect to the screen shown in A of FIG. 3 which is normally displayed. That is, two types of TV receivers, whose screens are attached in reverse, are required for the screen upward display method shown in A of FIG. 5 and the screen downward display method shown in C of FIG. Will end up.

[0006]

[Problems to be solved by the device]

 As described above, in the conventional vehicle-mounted TV receiver, it is necessary to prepare two types of TV receivers, that is, a screen-up system and a screen-down system, so that there is a problem that an increase in cost cannot be avoided.

The present invention has been made to solve the above problems, and provides an in-vehicle display device that realizes an up-screen display system and a down-screen display system using a common TV receiver. That is the purpose.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a body frame that can be mounted upside down on a vehicle, a display housed in the body frame and configured to be rotatable after withdrawal, and a body frame. It is characterized by comprising a switching element for determining the mounting direction and a scanning setting means for setting the scanning direction for each pixel of the display according to the output from the switching element.

[0009]

[Action]

 By previously determining the mounting direction of the main body frame by the switching element, an output corresponding to the mounting direction is applied from the switching element to the scan setting means. As a result, the scanning setting means sets the scanning direction reflecting the mounting direction for each pixel. As a result, it is possible to perform screen display corresponding to both the screen up-and-down method and the screen down-on method on a common display.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an in-vehicle display device of the present invention. 11 is a mounting direction switch for determining the mounting direction of the main body frame 2 for accommodating the display 1, that is, for determining whether the display 1 is mounted upward or downward. The attachment signal b having a different voltage value is output accordingly. As a method of switching the mounting direction switch 11, a method of manually switching at the time of mounting or a method of automatically switching according to the mounting direction using a mercury switch or the like is adopted.

Reference numeral 12 is a sync branch circuit for separating and outputting a horizontal sync signal c and a vertical sync signal d from the composite video signal input to the input terminal 10, and 13 is an RGB signal (primary color signal) e from the composite video signal. A color demodulation circuit 14 which outputs separately is a matrix controller 14 which inputs the mounting direction signal b, the horizontal synchronizing signal c and the vertical synchronizing signal d and outputs the gate selecting signal f and the source selecting signal g.

The display 1 uses, for example, an LCD element and includes elements X ₁ , X ₂ , X ₃ , ... X _n arranged in the X direction and elements Y ₁ , Y ₂ , Y ₃ , ... Y _n arranged in the Y direction. It is composed of a matrix of n × m pixels. Reference numeral 15 denotes a gate driver which inputs a gate selection signal f and outputs a control signal for activating each element Y ₁ , ..., Y _m in the Y direction. Reference numeral 16 denotes a source driver which inputs the RGB signal e and the source selection signal g and outputs a control signal for activating each of the X-direction elements X ₁ , ..., X _m .

Next, the operation of this embodiment will be described. First, the case where the display 1 is attached upward will be described. By switching the mounting direction switch 11 to the upward direction, the mounting direction switch 11 outputs a mounting direction signal b consisting of a voltage value for causing each pixel of the display 1 to perform forward scanning. On the basis of this, the matrix controller 14 performs the forward scanning, and therefore the control for activating the elements X _{1 to} X _n for the source driver 16 and the elements Y _{1 to} Y _n for the gate driver 15 is performed. Output a signal.

As a result, each pixel on the display 1 has X₁Y₁→ X₂Y₁→ X₃Y₁... X_nY₁→ X ₁ Y₂→ X₂Y₂→ X₃Y₂... X_nY₂... X₁Y_m→ X₂Y_m→ X₃Y_m... X_nY_m2 becomes active, and a screen in the normal scanning direction as shown by A in FIG. 2 is obtained.

Next, a case where the display 1 is attached downward will be described. By switching the mounting direction switch 11 to the downward direction, the mounting direction switch 11 outputs a mounting direction signal b having a voltage value for causing each pixel of the display 1 to perform reverse scanning. On the basis of this, the matrix controller 14 performs reverse scanning, so that the source driver 16 receives control signals for activating the elements X _n through X ₁ and the gate driver 15 for activating the elements Y _m through Y _1. Output.

As a result, each pixel on the display 1 becomes X _n Y _m → X _n-1 Y _m → X _n-2 Y _m ... X ₁ Y _m → X _n Y _m-1 → X _n-1 Y _m-1 → X _n-2 Y _m-1 ... X ₁ Y _m-1 ... X _n Y ₁ → X _n-1 Y ₁ ... X _n-2 Y ₁ → X ₁ Y ₁ becomes active in this order, The screen in the reverse scanning direction as shown by B in 2 is obtained.

As described above, according to this embodiment, the mounting direction of the display 1 is determined in advance by the mounting direction switch 11, so that the matrix controller 14 sources the control signal for performing the forward scanning or the backward scanning. Since it is output to the driver 16 or the gate driver 15, it is possible to display on the common display 1 a screen corresponding to both the screen up-and-down method. As a result, it is not necessary to prepare two types of TV receivers as in the conventional case, so that cost increase can be avoided. The present invention can be applied not only to TV reception but also to video reproduction in a display.

[0018]

[Effect of device]

 As described above, according to the present invention, since it is possible to display a screen corresponding to the screen up-drawing method and the screen down-drawing method on a common display, it is sufficient to prepare one type of receiver. The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an in-vehicle display device of the present invention.

FIG. 2 is an explanatory diagram of forward scanning and backward scanning according to the present embodiment.

FIG. 3 is a display example corresponding to a screen up-drawing method and a screen down-drawing method.

FIG. 4 is an explanatory view of a TV receiver which is a target of the present invention.

FIG. 5 is an explanatory diagram of a defect of the conventional example.

[Explanation of symbols]

 11 mounting direction switch 12 sync separation circuit 13 color demodulation circuit 14 matrix controller 15 gate driver 16 source driver

Claims (1)

[Scope of utility model registration request] 1. A body frame that can be mounted upside down on a vehicle, a display that is housed in the body frame and is rotatable after being drawn out, and a switching element that determines a mounting direction of the body frame. And a scanning setting means for setting a scanning direction for each pixel of the display according to an output from the switching element.